Vantage 4.0 Progress 9.0B Windows Server 2003 compatible?

We just recently purchased new server hardware/software with the
intention of installing Version 8.0 when it is ready.

In the mean time, we've got our existing NT4 server running Vantage
4.0 hooked into our new network. I have had a few random reboots just
recently on this machine (its pretty old and only a PIII 550MHz!) and
was wondering if ver 4 can be installed on Server 2003?

I've got the CDs etc and realise there are a few patches, but to get
rid of the old server would be great. Our company's most important
data is on the most fragile machine!

If it's a big job, then I'll probably just ride out the storm .I also
don't want to create any problems installing 8.0 if it will get
confused that there was once version 4 on the same machine.

Can anyone offer any advice? I've successfully followed the advice
you've given on quite a few queries now, and you keep getting it
right!

Cheers,

Jonny